How do you fix wii you eshop error code 107-3131?

To fix the Wii U eShop error code 107-3131, first ensure that your internet connection is stable and functioning properly. You can try restarting your router and the Wii U console. If the issue persists, check for any system updates or try changing your DNS settings to use google's DNS (8.8.8.8 and 8.8.4.4). If none of these steps work, consider contacting Nintendo support for further assistance.